How To Fix I0018 - Field contains invalid characters

SAP Error Message - Details

• Message type: E = Error

• Message class: I0 - Messages for PM tables

• Message number: 018

• Message text: Field contains invalid characters

What causes this issue?

You have entered an object number that contains special characters that
are not allowed.

System Response

INCLUDE 'KEINE-VERARBEITUNG' OBJECT DOKU ID TX LANGUAGE E

How to fix this error?

Only use allowed characters when assigning a number.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message I0018 - Field contains invalid characters ?

  The SAP error message I0018, which states "Field contains invalid characters," typically occurs when the input data in a specific field does not conform to the expected format or contains characters that are not allowed. This can happen in various contexts, such as during data entry, file uploads, or when processing transactions.
  Causes:
  
  Invalid Characters: The input may contain special characters, spaces, or symbols that are not permitted in the field.
  Data Type Mismatch: The field may expect a specific data type (e.g., numeric, alphanumeric) and the input does not match this expectation.
  Length Restrictions: The input may exceed the maximum length allowed for the field.
  Configuration Issues: The field may have been configured to accept only certain values or formats, and the input does not comply.
  Localization Issues: If the system is set to a specific language or locale, certain characters may not be recognized.
  
  Solutions:
  
  Check Input Data: Review the data being entered or uploaded to ensure it does not contain any invalid characters. Remove any special characters or spaces that are not allowed.
  Validate Data Type: Ensure that the data type of the input matches the expected type for the field. For example, if the field expects a numeric value, ensure that only numbers are entered.
  Adhere to Length Restrictions: Make sure that the input does not exceed the maximum length defined for the field.
  Review Field Configuration: Check the configuration settings for the field in the SAP system to understand what characters or formats are allowed.
  Use Correct Encoding: If data is being imported from an external source, ensure that the encoding is compatible with SAP (e.g., UTF-8).
  Consult Documentation: Refer to SAP documentation or help resources for specific field requirements and constraints.
  
  Related Information:
  
  Transaction Codes: Depending on where the error occurs, you may be using different transaction codes (e.g., VA01 for sales orders, ME21N for purchase orders).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Exits and BAdIs: If the error is occurring in a custom development scenario, review any user exits or Business Add-Ins (BAdIs) that may be affecting the field validation.
  Testing: If possible, test the input in a development or quality assurance environment to replicate the issue and identify the root cause without affecting production data.
  
  By following these steps, you should be able to identify the cause of the I0018 error and implement a solution to resolve it.